plain-clothed security professional at the door of every schoolie the country? there. >> most schools have campus police who are armed. one thing we advocate for teachers, you have to do monthly fire drills. you have to do monthly drills. so let's take those drills and review them and see what worked well. remember, a fire drill is an evacuation drill. so we can take what we're it doing and improve upon that. we stress that when developing crisis plans, schools work with your local officials, with your law enforcement, with your fire, so you get local input to the best action to take. >> with parents, too, notifying them, what they can do as they hear it, for many, on the news. thank you, d very helpful information today. >> thank you.